Elasticised yarn, a method for making said yarn and elasticised fabric made therefrom

Abstract

An elastic thread yarn comprising linen and / or ramié and / or hemp and an elastic thread, with a thread made of an elastomeric material, and a substantially inextensible yarn made of linen and / or ramié and / or hemp helically wound about the elastomeric core at a predetermined number of windings per length unit of elasticized yarn, wherein, for each metric count Nm, the number of windings substantially inextensible yarn of the elasticized yarn, is set between two values indicated by two curves (12, 13) which can be expressed according to exponential laws, for example, with the same exponent, i.e. according to equations of the form T=K N0, 327 where K is 20 and 50, respectively. In particular, an intermediate curve 11 is such that, by choosing for a given metric count a number of windings proximate to curve 11, this best feature balance is obtained. In an exemplary embodiment, the core comprises a bare elastic thread, i.e. an elastic thread that is not coated by other fibers. In another exemplary embodiment, the core comprises an elastic thread coated with a natural fiber as cotton or viscose, or with a combination thereof. The elastic thread yarn according to the invention provides elasticized fabrics containing linen and / or on ramié, which has, in particular, a better surface regularity than well-known elasticized fabrics comprising linen, and which is comparable with the regularity of the elasticized fabrics comprising natural fibers such as cotton, wool, etc. and synthetic fibers, and also allows using ramie and hemp yarns to make elastic thread yarns and fabrics, for example, for making cloth items.

Description

[0001]This application is a 371 of PCT / IB2011 / 054842, filed on Oct. 31, 2011, which claims priority to Italian Patent Application No. PI2010A000123, filed Oct. 30, 2010, and Italian Patent Application No. PI2011A000022, filed Mar. 14, 2011.SCOPE OF THE INVENTION[0002]The present invention relates to elastic thread yarns based on natural fibres such as linen, ramié or hemp, and to fabrics produced starting from such yarns.[0003]The invention relates also to a method for making such elastic thread yarns.BACKGROUND OF THE INVENTIONTechnical Problem[0004]Since some decades, elasticized fabrics made from elastic thread yarns of many kinds are used. The advantage of such fabrics consists of a high deformability of the items that are obtained from them. In particular, garments are made such as garments that do not hinder who wears them, or conform themselves to the movement of the users, thus generating a comfort sensation. This is particularly appreciated in underwear clothing or in sport...

AI Technical Summary

Benefits of technology

"The present invention provides an elastic thread yarn that contains stiff and relatively poor elastic fibers, which is adapted to make elastic fabrics that have a smooth surface and are free from small yarn masses or yarn lamps distributed on the surface. The yarn has a high number of windings per length unit, which allows the windings to remain next to each other without interlacing. The yarn contains ramié, linen, or hemp fibers, and is easy and cheap to produce. The invention also provides an elasticized fabric made from the yarn that looks and feels like other commercially available elasticized fabrics."

Problems solved by technology

However, such elasticized products have poorer surface features than the products obtained from other textile fibres.

Accordingly, they are coarser and less comfortable than other elasticized fabrics, besides showing a rougher look.

By this technique, linen elastic yarns are obtained which have the drawback of not allowing a single-step dying operation and / or a single-dying-agent dying operation.

In fact, the dying agents that can dye the linen fibres are not adapted to dye the nylon yarn that covers the core, and vice-versa.

Moreover, these elastic thread yarns cannot provide an elasticity, a comfort and a tactile sensation, i.e. a “hand” sensation, like the elastic thread yarns based on other textile fibres can provide.

However, ramié is relatively not very elastic.

Like linen, ramié is a rigid fibre, not very elastic and prone to crease.

This reduces however the brilliance properties of ramié, and requires preferably anti-crease final treatments.

Even in clothing, the use of hemp is limited, due to its low elasticity and its tendency to crease.

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